SOLUTION: 1/4(60+16s)=15+4s

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Question 159517This question is from textbook Algebra
: 1/4(60+16s)=15+4s This question is from textbook Algebra

Answer by checkley77(12844) About Me  (Show Source):
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1/4(60+16s)=15+4s
(60+16s)/4=15+4s
60+16s=4(15+4s)
60+16s=60+16s
0=0 ANSWER.
OR:
1/(240+64S)=15+4S
1=(15+4S)(240+64S)
1=3,600+960S+960S+2,56S^2
1=3,600+1,920S+2,56S^2
2,56S^2+1,920S+3,600-1=0
256S^2+1,920S+3,599=0
USING THE QUADRATIC EQUATION: x=%28-b%2B-sqrt%28b%5E2-4%2Aa%2Ac%29%29%2F%282%2Aa%29 WE GET:
S=(-1,920+-SQRT(1,920^2-4*256*3,599)]/2*256
S=(-1,920+-SQRT(3,686,400-3,685,376)/512
S=(-1,920+-SQRT1,024)/512
s=(-1,920+-32)/512
s=(-1,920+32)/512
s=1,888/512
s=-3.6875 answer.
s=(-1,920-32)/512
s=-1,952/512
s=-3.8125 answer.